Exhaust Paper Filter 1 package includes: 4 pieces of Exhaust Paper Filter 1 piece of Air Intake Paper Filter Product Features: Manufacture supply, recommend to change regularly Long-lasting, helps extend the lifespan of your appliance Fits Sonya Dryer Model: SYD-40E/SYD-60E, and Panda Dryer:Model: PAN40SF/PAN725SF Color: WhiteMaintenance tips: Remove the paper filter gently and clean them with a soft brush or vacuum cleaner. Do not wash with water or other liquid. Exhaust Payper Filter is recommended to change every 3 months, the air intake paper fiter is recommended to change every 12 months.